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An Earth trojan is an asteroid that orbits the Sun in the vicinity of the Earth–Sun Lagrange points L 4 (leading 60°) or L 5 (trailing 60°), thus having an orbit similar to Earth's. Only two Earth trojans have so far been discovered.
Astronomers estimate that the Jovian trojans are about as numerous as the asteroids of the asteroid belt. [6] Later on, objects were found orbiting near the Lagrangian points of Neptune, Mars, Earth, [7] Uranus, and Venus. Minor planets at the Lagrangian points of planets other than Jupiter may be called Lagrangian minor planets. [8]
A small number of asteroids have been found which are co-orbital with Earth. The first of these to be discovered, asteroid 3753 Cruithne, orbits the Sun with a period slightly less than one Earth year, resulting in an orbit that (from the point of view of Earth) appears as a bean-shaped orbit centered on a position ahead of the position of ...
In some ways these asteroids look similar to the near-Earth asteroid ... including a close encounter with another main belt asteroid called Donaldjohanson in 2025. ... There are about 7,000 Trojan ...
"NEO Earth Close-Approaches" (Between 1900 A.D. and 2200 A.D., NEOs with H <=22, nominal distance within 5 LD) – NASA/JPL's Near-Earth Object Program Office "Near Earth Asteroids (NEAs): A Chronology of Milestones" – International Astronomical Union; NEODyS-2 – Near Earth Objects Dynamic Site sponsored by ESA; TECA Table of asteroids next ...
Astronomers spotted a possible “sibling” planet that shares the orbit of another exoplanet in a system located 370 light-years away.
2010 TK 7 was at the near-Earth end of its tadpole in 2010–2011, [4] which facilitated its discovery. 2010 TK 7 's orbit has a chaotic character, making long-range predictions difficult. Prior to 500 AD, it may have been oscillating about the L 5 Lagrangian point (60 degrees behind Earth), before jumping to L 4 via L 3 .
Here's what to know about Apophis and how space agencies hope to protect Earth from other asteroids like it. Apophis to make 2029 flyby to Earth Apophis is projected to pass within 20,000 miles of ...